Lock.



W. E. SPARKS,

LOCK.

APPLICATION FILE-D JULY 22, 1911.

INVENTOR. I

ATTORNEYS.

COLUMBIA PLANOGRAPH 60.,WASHINGTON, n. c

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W. E. SPARKS.

LOCK.

APPLICATION FILED JULY 22, 1911- 1 1 5 1 ,225. Patented Aug. "24, 1915.

4 SHEETS-SHEET 2.

WITNESSES: I 'JNVENTOR.

I u BY a W I mm P we A TTORNEYS' W. E. SPARKS.

LOCK. APPLICATION FILED lULY 22.19M-

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JNVENTOR.

ATTOR W. E. SPARKS.

LOCK. APPLICATION man JULY 22. 1911.

Patented Aug. 24, 1915.

4 SHEETS-SHEET 4.

WITNESSES: INVENTOR.

r BY flKW 031M MA.

A TTORNEYS vvILLrA-M E. sP itKs, orv NEW nAvE CoNNnCiTICuT, A's-slams TDHSABGENT & COMPANY, or NEW HAVEN, CoNNnCTIcnT, A CORPORATION or CONNECTICUT.

Lock.

Specification of Letters Petciit.

Patented Aug. 24 2, 1915.

A tucauon ma July 22, 1911. Serial No. 639,961.

To all whom it may concern Be it known that I, VVILLiAM E. SPARKS, of the city and county of New Haven and State of Connecticut, have invented new and useful Improvements in Locks, of which the following is a full, clear, and exact description when taken in connection with the accompanying drawings, which form a part thereof.

My invention relates to locks, and its objects are to provide a device adapted to prevent the operative insertion of a key oi keys into a keyhole, while permitting the operative insertion of another key into the same keyhole, and to provide such arrangement, particularly in connection with abolt operated from the outer side of the door and a bolt operated from the inner side, the latter being operable to set the key stop member in blocking position; to provide in connection with dogging means for a latch bolt operable from one side of the door, means whereby the dogging mechanism is released when the dead bolt operable from the other side of the door is protracted, and whereby the protractio'n of the dogging means retracts the said dead bolt; to provide a bolt tumbler mechanism of a special construe tion; and to generally improve the construction of a lock of this type.

To these and other ends, my invention is embodied in preferable form in the device hereinafter described and illustrated in the accompanying drawings, in which Figure 1 is a side view with the cap plate removed, and the dead bolt and interior dogging bolt retracted; Fig. 2, a. similar view with the dead bolt protracted; Fig. 3, a similar view with the interior bolt constituting the latch dogging means protracted and deadbolt retracted; Fig. 4;, a detail view of lower part of lock showing deadbolt protracted and tumblers removed; Fig. 5, a similar view showing interior dogging bolt protracted and deadbolt retracted; Fig. 6, a rear view with dogging bolt partly retracted and key stop member partly withdrawn from blocking position; Fig. 7, a view similar to Fig. 6 with dogging bolt protracted and deadbolt retracted; Fig. 8, adetail section of the deadbolt and tumblers with change key in the keyhole; Fig. 9, a similar view with the emergency key in place; Fig. 10, a detail side view of the change or guest key employed in connection with this lock;

Fig. 11, a similar view of the master emer gen'cy key; Fig. 12, detail plan of key blocking member; Fig. 13, detail side view of latch bolt head, dogging b'olt therefor, and

tumbler releasing mechanism; Fig. 14:, a de- C tail plan of stop tumbler with key inserted from opposite side through upper keyhole; Fig. 15, a similar view showing the stop tumbler operated by the said key; Fig. 16, a cross section through upper keyhole showing same engaged by the change key; Fig. 17,.a view similar to Fig. 16, showing the keyhole engaged by the emergency key; Fig. 18, a detail side view of tumblers showing the racking piece and stop tumbler in release position; Fig. 19, a cross section Iiglnl ough the tumblers controlling the dead Throughout the several views, like letters of,reference denote the same parts.

Referring to the drawings; 1 is a casing and 2 the cap plate of a lock. Slidably mounted within the casing is a latch bolt 3 operated by a yoke, hub and knob construction of ordinary form. A sliding interior bolt a is mounted in the casing, and is adapted to constitute a dogging member to dog the latch bolt whereby the latter may serve as a locking bolt to prevent the opening of the door from the outside. To this end the forward portion of the bolt 4 is adapted in protracted position to bear against the inner face of the head of the latch bolt. The dogging bolt 4 is operated from' the exterior of the casing by .a key insertible througha keyhole 5 formed in the casing, orby other instrumentality preferably from the inside of the door; The dogging bolt carriesa spring pressed tumbler 6 having a projection 7 to engage a tumbler stump 8.

Projecting downwardly from the tumbler 6 is an inclined shoulder 9 with which is preferably associated a rounded cam pin 10 fixed on the end of one arm of a doggingbolt releasing member consisting of a lever 11 pivoted on the fixed pin 12. The other arm of the lever extends into line with a shoulder 13 of adead bolt 14, and the lever movement of the lever to retract the bolt 4 and tumbler by the pressure of the cam pin against the inclined shoulder 9 until the projection is caught and held by the upper face of the tumbler stump, thereby holding the tumbler in such position that the dogging bolt may be readily pushed back to retracted position when the latch bolt itself is retracted by the knob or otherwise.

Pivoted on a pin 15 fixed to the casing are spring pressed tumblers 16, which are provided on their outer edges with notches 17 at the extreme forward ends of the tumblers, and with notches 18 between the ends. The tumblers 16 are operated by intermediate tumblers 19 pivoted on a pin 20 fixed to the casing, which tumblers 19 are actuated by the bit of a key adapted to be inserted through the keyhole 21 passing through the cap plate on the outer side of the lock. The tumblers 19 are supported from beneath in a predetermined position by means of a suitable projection 19 within the case.

The notches 17 of the tumblers 16 stand normally in registry with the stop lug 22 of a spring pressed bolt locking and releasing member or racking piece 23, which has a pin 24: adapted to engage either end of a rounded shoulder 25 projecting into a slot 26 formed in the dead bolt, whereby when the lug 22 is free to move into the notches of the tumbler 16 the dead bolt may be protracted or retracted, but when said stop lug is prevented from moving into the notches the pin 24 is held rigidly against one end of the shoulder 25 so as to prevent the sliding movement of the dead bolt. 7

Mounted upon the pin 15 and bearing upon the tumblers 16 is a stop tumbler 27 having a spring 28 which bears against the side wall of the casing and is adapted to hold a lug 29 normally in registry with the stop lug 22 of the racking piece 23 in order to prevent the rocking movement of the racking piece 23 except when the stop tumbler 27 is moved sufficiently to carry the lug 29 out of line with the lug 22. The stop tumbler 27 is provided with an inwardly projecting lug 30 which engages the edges of the tumblers 16 and serves to limit the spring pressed movement of the stop tumbler so as to hold it in proper position relative to the stop lug of the locking tumbler.

Between the lug 29 and inner edge of an upwardly extending elongated tongue 31 is .iormed a notch 32 which permits the stop lug 22 to enter the notches 18 in the tumbler 16 when said tumblers and the tumbler 27 are moved pivotally by the contact of the controlling tumblers 19 and the pressure of the spring 28, respectively. The tongue 31 of the stop tumbler extends upwardly adjacent to the keyhole 5 into the path of the bit of a key that may be inserted through the keyhole from the inner side of the door, whereby said stop tumbler may be rocked from its stop position by the rotation of the inside key to permit the retraction of the dead bolt by the further rotation ot'said key. To effect this retraction of the dead bolt from the inside, said dead bolt is provided with an upwardly extending talon 33 movable into and out of the path or" the bit of the inside key, and provided with a raised rounded shoulder 31 to engage the bit of the key, whereby when the dead bolt is in protracted position and the door is locked from the inside by the deadlocking of the latch bolt by a key the movement of the key in so looking the door will operate through the release of the stop tumbler and the engagement of the bit with said talon to retract the dead bolt.

Pivoted on the pin 20 is a key stop member consisting of a lever 35 having a lower arm 36 and an upper arm 37. The upper arm of the lever is provided with a lug 38 with which is adapted to contact the forward end of the dogging bolt 4, whereby in the protracted movement of said dogging bolt the lever is so rocked on its pivot as to carry the end of the lower arm of the lever upwardly and transversely into the path of entry or insertion of the key which directly operates the dead bolt. The stop lever preferably consists of a fiat piece of metal, and it lies directly against and is rigidly supported by the rear wall of the casing. The end of the lower arm of the lever is provided with a hole 40 which is adapted to register with the hole ll formed in the rear wall of the casing, and adapted to receive the stem of a key inserted into the lower keyhole. A spring 42 attached to the lever serves to normally hold the lower rocking arm of the lever out of line with the key stem aperture and to return the lever to such normal position when the dogging bolt 4 is retracted. The stop member will permit the insertion into the keyhole formed in the cap plate of the bit of any of the keys employed to operate the bolt, but is of sufficient thick 4 ness to so limit and shorten the insertion movement of a guest key or master key as to hold the bit of said key in alinement with the wall of the casing formed by the cap plate so that it is impossible to rotate the key. This construction affords a rigid support for the key blocking member and so will prevent the bending or breaking of the latter through the attempted insertion of I the stop memberabove described, particularly cooperates with *the construction in which the bolt operated from-the inside of the door and="whi'ch cont rols theoperation of said stop member is associated "with the locking -bolt 'in the casing below the said bolt operated from the inside.

In Fig. 10 is shown achange or guest key 48,- the stem of which is of such diameter that: the stem will enter F the aperture 41 in the rear wallof the'casing thus permitting the projection'of the' bit-of the 'key into operative position. The diameter of the ward aperture em -however, being 'less than the diameter of the aperture" 41,- and also less than the'diame'ter of the stem-o-f the key 43 will block the 'complete insertion of said key, and thus throw the bit into engagement with the wall of the cap" plate.

In Fig.v 11, an emergency key 44' is shown of which the stem is provided withan elongated portion 45 oflessdiameter' than that or the stem of thekey43 and -vvhic'hyportion is capable of passin through" the aperture 40 in the arm of the blocking lever-so that the bit of said emergency kev maypass'beyond the cap plateand intoopera'ti've position, wherebv notwithstanding that the stop member may be in-such position asto pre vent the operative insertion ofthe' key 43,

.Nhen the door has been closed fr'om" the inside of the room and itis desired to dead lock the latch bolt-sothat said latch bolt may serve asa locking b'olt, the gi'iest key 4-3-is insertedtrom-the insideet' the door into the keyhole 5- and thetumblerdreleased from its tumbler stump and the dogging bolt 4: protracted carrying its-front end against the inner "taceof the hea'dfof the latch bolt, whereupon when l the tumbler is released and engages the forward side of the tumbler stump the latch bolt will" be deadlocked against rearward *movement. The forward movement of the dogging bolt carries forward the upper end of the stop lever 35, which movement'pr'ojects thelower arm of said stop'levertransversely-into-the keyway of the lower keyholewith'thehole 4-0 in registry with the hole ll in ther'ear wall 'of-the casing. In this'p'osition. of 'thestop member it will be impossible for' any one to insert completely any key except the key 45 into the lower keyhole, 'and therefore it will be impossible to unlock the door from the outside or protract'thedead bolt into locking position except by said'emegency key. Should it be found-desirableto unstemof which will p'ass'throughthe' aper ture-"IO 'inthe-stop member and into the aperture' 41 in the casing so that the bit' otthe #key can be inserted into operative position and the key operatively rotated.

ln unl'ocking the *dooratter it has been l'ocked*onthe inside as described, it is necesr-sary thatthe' bolt' 14L be first protracted. In turning thekey to effect such protraction -the intermediateactuated tumblers'l9 are rocked on their pivots so as to carry them against the tumblers 16 which tumblers are -thereby turned until their notches '18 are -carried into registry withthe stop lug 22 of the racking-piece 23. This movement of the tumb'ler'16 permits the stop tumbler 27 to be moved by its spring28 sufficiently far to'bring the notch'32 also into registry with the' stop. lug I 22, 1 and thereupon in the continnedmovement of the key the deadbolt -may bei'protractedgthe racking piece 23 being enabled to yieldingly move downward by'the" entranceof the stop lug 22 into the notches or the tumblers. In the protracted movement of'the bolt-its shoulder 13 will bearagainst the lower end o'f'the lever 11 and the cam pin 10 of said lever will be forced against the'inclined shoulder 9 of the tumbler 6,thus freeing said tumbler from engagement with the'front face of the tumbler stump and forcing both the tumbler and the doggingbo'lt backwardly away from the head of the latch bolt and sufiicient-ly far to enable the projection 7 to engage the upper edge ofthe tumbler stump. In this position otthe tumbler 6, the dogging bolt wilt be released from-dead locking position, and thereupon the latch bolt-may be retracted by turning the knob. This retract- "ing movement of the latch bolt carries the dogging bolt back until'the projection 7 of the spring pressed tumbler 6 slips behind the tumbler stump, whereupon the dogging bolt will be locked in retracted position, and the latch will be free to operate. Thereupon theemergency key is rotated in the opposite direction operating the'tumblers in the same manner =as'before described, and retracting the "dead bolt, whereupon the door may be opened.

Should the dead bolt have been-first protracted, the 'protractionof the dogging-bolt from the inside for the purpose of dead looking the latch bolt'will serve to retract said deadbolt. Thisis effected by means of the operation of the bit of a key inserted from the'insideyupon the tongue 31 of the stop tumbler 27, which serves to move said stop tumblerrearwardly out of alinement with the-lug 22 of the racking piece 23, thereby permitting the lug 22 to enter the forward 'notches 17 of the tumblers 16 when the dead bolt is retracted, and in the continued movement of the key the complete retraction of the dead bolt is efiected by the engagement of the bit with the vertically 1 prolonged talon arm 33. On further rotation of the key the bolt 4 is moved forward into deadlocking position in respect to the latch bolt, as above explained.

It will be understood that whenv the bolt 14v is actuated by a key from the outside, the

tumblers 19 and the stop tumbler 27 are moved together in one direction to release the bolt from the locking member or racking piece 23, whereas when said bolt is to be retracted by a key inserted from the inside of the door, the release, of the bolt is efthe outside, and yet the bolt may be actuated from the inside in a much simpler manner,

e., by the actuation of a less number of tumblers, because there is little likelihood that the lock will be picked, or otherwise attacked, from the inside. The security of the lock is very much increased by using a key with an unsymmetrical bit, as shown, which is adapted to actuate a relatively large number of tumblers, when. inserted from the outside of the door, but which,

nevertheless, in spite of its unsymmetrical form, is adapted to release the tumbler mechanism equally well when the key is inserted from the inside of the door.

Having now described my invention, what I claim and desire to secure by Letters Patent, is

1. In a lock, the combination with a bolt, of a plurality of keys for operating the same, a casing having a common keyhole for said keys, a movable key stop member operable when in stop position to prevent the operation of one key in said keyhole and to permit the operation of another key therein,

and a key operated member movable relatively to said stop member and bolt and operable to hold said stop member in stopping position; substantially as described.

2. In a lock, the combination with a plurality of keys, a bolt operable by said keys, a casing having a keyhole common to said keys, a movable key operated member above said bolt, and a key stop member for said keyhole movable relatively to said upper member and operated thereby and operable when in stop position to prevent the operation of the bolt by one key while permitting such operation by another key; substantially as described.

3. In a lock, the combination with a casing having a keyhole through one wall to to rotatably operate when said device is in obstructing position, and means to operate sald devlce from the exterior of the casing; substantially as described.

5. In a lock, the combination with a cas- 7 ing having a keyhole through onewall there,- of, and having a key obstructing device lylng against an opposite wall, a key having a bit held by said device in engagement with the keyhole wall, another key having a bit formed to pass said keyhole wall when said device is in obstructing position, and means to operate said device from the exterior of the casing; substantially as described.

6. Ina lock, the combination with a-casing having opposite walls and having a keyhole in its outer wall, of a key having a bit rotatably operable between said walls, a key blocking device lying against the inner wall and movable transversely of the keyway to throw said bit into engagement with the outer wall to revent the rotation of said key, and another key having a bit formed'to pass said wall when said device is in blocking position, and means to operate said device substantially as described.

7. In a lock, the combination with a casing having a keyhole through one wall thereof, and having a key stem hole in the other wall thereof, a key blocking device intermediate said holes and having a hole adapted to register with the key stem hole and of such diameter as to" prevent the insertion therein of the stem'of one key and to permit the insertion therein of. the stem of another key; substantially as described.

8. In a lock, the combination with a casinc having a key stem hole, a vblocking'device operable to lessen the entrance area ifsaid hole, a plurality of keys one of said keys having a stem of less diameter than the other to permit it to enter the casing hole when the said device is in blocking position; substantially-as described.

9. In a lock, the combination with a latch bolt, of deadlocking means therefor movable to protracted position by a key, a deadbolt,

and means to release said deadlocking means,

by the protraction of said deadbolt; substantially as described.

10. In a lock, the combination with a latch deadbolt, andmeans to release said dogging member from: its locking means when the deadbolt is protracted; substantially as described: w

11. 111 a. lock, the. combination with a latch bolt; ofladogging. bolt therefor, alocking, tumbleri for: said dogging'bolt, a deadbolt,-

12. In a lock, the combination With EL/p111,

rality of bolts, a locking, tumbler for one bolt, and a .pivotedmember, operable by the other 'boltrin its protracted movement to releasesaid tumbler; substantially asv de-: scribed.-

13..Inaa lock, ,thecombinationvwith a plurality of bolts; of a latch boltaa hub, separate independently operable tumblers for saidbolts, means-for operating one or said bolts .rlirectly from, the inside only'of the door, and means-for deadlocking hub by, the protraction of said inside bolt; substantially'as describedi 143 111 a lock,-the,combinationi witha plurality of bolts, of means for operating di-. rectly; oneoftsaidbolts from the inside of the look-only, separate independently operable tumbler mechanismof each bolt, and a latch bolt-deadlocked: by said insidebolt whensthe latter is protracted; substantially as-described.

- 15.5 In a lock, the combination with: a :plu-

rality ofubolts, of a pluralityof keyways, a,

tumbler engaging one of said bolts, a stop tumbler normally positioned toprevent the released said bolt engaging tumbler, a key operable. through onekeyway to release said step.- tumbler andprotractporiretract the bolt engaged bythe other tumbler, and a key operablee throughthe otherway to release said stop tumbler and retract said bolt; substantiallyias described.

165 111 a. lock, the combinationwith a plurality ofabolts, otia; plurality of keyways,

andn a stop member mounted zindependentlya of-said-bolts. but operable by. one ofthem to obstructone ofthe keyways; substantially'as described.

17'. In a lock, .a dead bolt, a movable ward associated with the keyhole-thereof, a latch bolt, and a deadlocking. device for said latch bolt Which shiftssaid Ward into operative position; substantlally as described.

18. In :aalock, a case havinga keyhole, a

deadbolt in saidcase operable by "WZLLVOf said keyhole, a movable ward associated witlr said lkeyhole, means normally holding; said Ward in its non locking position, a latch bolt, and a latch-.bolt deadlockin g member which smovessaid-Ward into blocking position. asthe latch bolt is deadlocked; substantiallyas described? I 19." In a lockythe-combination of a case, a

slide therein movable from the inside of the door, a slide movable, fromwthe'outside of the door, and means .forreleasingi-the first named slide for retraction, without retracting:it, automatically as the second-slide is protracted; substantially as described" 20. In a. lock, vthe combination of two bolts, tumbler. mechanism for :each bolt, and a pivoted lever operable by one of the bolts to releasezthetumbler; mechanism of the other bolt; substantially as described.

21. Ian .-lock,the combination of an inside bolt, anoutside bolt, tumbler mechanism for each of said bolts, and-apivoted lever operable'bythen-outside:'boltgas the latter is pro tracted to release the tumblermechanism of the inside bolt; substantially asdcscribed.

22;; In a lock, the combination of'two independent slidingumembers capable of occupying: their protractedupositions. at the same time, tumbler 1 mechanisms for the respective members, and means intermediatesaid" membersfor releasing one-of said tumbler mechanisms as the-other member is protracted; substantially *as described:

23'. In a lock, the combination of'two independentsli'ding members capable of occupying. their protracted vpositions at the same time, tumblerimechanisms for-said members, means for releasing the tumbler mechanism of one of said members as the. other anember is protracted, and means for Y retracting the member having rtheireleased tumbler mecha nism; substantially as described.

24:. Ina .lock,-a case, two sliding members therein, a keyhole at the outside of the case forthe insertion ofa key, said key when so inserted adapted to move one of said members in eitherdirection, and 2a keyhole at the insideof the casefor the insertion of a key to move the :other; sliding .member in either direction, said ifirst member being :movable rearwardlyby a key insertedin said inside keyhole; substantially as described.

25. In a look; a *deadsbolt, a latch bolt, and means-to simultaneously deadlock the latch bolt and retract thedead bolt; substantiallyaas described.

26. In a lock,-a deadbolt, a latch bolt, and

means actuated "from theinsideof the doortive position as said dead bolt is retracted; Y

substantially as described.

31. In a look, a latch bolt, a deadlocking device therefor, means to move said deadlocking device into deadlocking' position, and a dead bolt retractable independently, or retractable by said last named means,

simultaneously with the deadlocking of the latch bolt; substantially as described.

32. In a look, a latch'bolt, a deadlocking device therefor movable by a key" into operative position from the inside of the door, 7

and a dead bolt protractable and retractable independently from the outside of the door, or retractable by the aforesaid key as the latter moves said deadlockingdevice to operative position; substantially as de scribed.

33. Ina lock, a latch bolt, means for retracting the same manually from the outside of the door, a dead bolt, dogging means for said retracting means operable from a the inside of the door, means for locking said dogging means 1n inoperative pos1t1on, and means for automatlcally releaslng said locking means upon'the protraction of said dead bolt; substantially as described.

34. In a lock, a latch bolt, an outside key bolt retractable from the inside of the door, and an inside key bolt protractable into deadlocking position with respect to the latch bolt simultaneously with the rectraction of said first key bolt from the inside I of the door; substantially as described.

35. In a lock, a dead bolt, a case therefor, keyholes at opposite sides of the case, out of alinement with each other, and a series of tumblers for said bolt having twodifierent positions in which the bolt is released by keys inserted in the respective keyholesg substantially as described.

36. In a lock, a case, a bolt therein, and a series of pivoted tumblers for said bolt having one position for releasing the bolt from one side of the door, and another position for releasing the bolt from the opposite side of the door; substantially as described.

37. In a lock, the combination of a case,

a dead bolt therein, a plurality of tumblers 5 v a plurality of tumblers therefor, including for said bolt, means for operating said bolt from one side of the case by the actuation of all of said tumblers, and means for operating said bolt from the opposite side of the case the actuation of less than the full number of tumblers; substantially as described.

38. In a lock, the combination of a case, a dead bolt therein, aseries of tumblers for said bolt, a key insertible into thecase from one side and operable to throw said bolt.

by the joint actuation of said tumblers, and

means to actuate said bolt from the other.

side of the case by the individual actuation of one of said tumblers; substantiallyas described.

. 39. In a lock, the combination of a case, a dead bolt therein, a series of tumblers for said bolt, a key insertible into the case from the outside to throw said bolt by the joint actuation of said tumblers, and means to retractthe bolt from the inside of the door by the individual actuation of one of saidoperable from the opposite side of the door to engage one of said'tumblers individually and actuate the bolt without operating the other tumblers;'substantially as described. 7

41. In a look, a dead bolt, a plurality of tumblers therefor, means at one side of the door to protract said bolt by the actuation of a plurality of tumblers, and means at the opposite side of the door to retract the bolt by the actuation of 'a less number of tum: blers; substantially as described.

42. In a lock, a dead bolt, a plurality of. pivoted tumblers therefor, means at one side of thedoor to protract said bolt by the joint actuation of all of said tumblers, and means at the other side of the door to retract the bolt by the individual actuation of one of said tumblers; substantially as described.

43. In a lock, the combination of a bolt, a plurality of tumblers therefor, a key having an unsymmetrical bit adapted to release the bolt by actuating. a plurality of such tumblers, when the key is inserted from one side of'the door, and means whereby said bit is adapted to release the bolt by the ac-.

tuation of a less-number of tumblers when of the door; substantially as described.

44. In a lock, the combination of a bolt,

and tumbler. mechanism therefor, including a stop tumbler movable in one-direction to release the bolt from one side of the door,

and movable in the other direction to release the. bolt from the opposite side of the:

door; substantially as described.

45. In a lock, the combination of a bolt,

a stoptumbler movable in'either of two directions to release the bolt, a .key for pro-' tracting the bolt from one side of the door by moving said stop tumbler with theother tumblers in .one direction, and lmeanstocactuate-said boltfromtheopposite side of the door by shifting the stop tumbler individually in the opposite direction; substantially as described.

46. In a look, a case, adead boltztherein, keyholes at opposite sides of the case, and

tumblers for said dead bolt-havingseparate releasing positions corresponding to the -re spective keyholes; substantially as described.

47. In a look, a case having a keyhole, a dead bolt in said case, a plurality of tumblers for said dead bolt movable to a predetermined releasing position by a key inserted in said keyhole, said tumblers normally lying in another releasing position, a member in the case to prevent normally the release of the bolt With said tumblers in said second releasing position, and means to shift said member to release the bolt; substantially as described.

48. In a lock, a case having a keyhole at one side, a dead bolt in said case, a plurality of tumblers for said dead bolt movable to a predetermined releasing position by a key inserted in said keyhole, said tumblers normally lying in another releasing position, a member in the case to prevent normally the release of the bolt With said tumblers in said second releasing position, and means operable from the exterior of the case at the side opposite said keyhole to shift said release preventing means to an inoperative position; substantially as described.

49. In a look, a case having a keyhole at the outside, a dead bolt in said case, a pivoted tumbler for said bolt movable to a predetermined releasing position by a key inserted in said keyhole, said tumbler normally lying in another releasing position, a stop tumbler in the case to prevent normally the release of the bolt With said first tumbler in said second releasing position, and means operable from the inside of the door to shift said stop tumbler to an inoperative position; substantially as described.

50. In a lock, a case having a keyhole at the outside, a dead bolt in said case, a tumbler for said bolt movable to a predetermined releasing position by a key inserted in said keyhole, said tumbler normally lying in another releasing position, a stop tumbler to prevent normally the release of the bolt, With said first tumbler in said second releasing position, and means operative from the inside of the door to shift said stop tumbler to an inoperative position and retract the bolt; substantially as described.

51. In a look, a case, a bolt in said case, a keyhole at one side of the door, a single group of tumblers for said bolt, a key insertable into said keyhole to release and actuate said bolt With said tumblers in a predetermined releasing. position, and means operable tromthe opposite side ot the door atpapoint out. ofalinement With said keyhole to; release 1 and ;operate' said bolt- With said tumblers in: another releasing position; substantially as described.

52. In a =lock, a case, a bolt insaid-case, a keyhole at the outside of the door, a pluralityof I tumblers for said bolt, a key insertible-into said keyhole to actuate said bolt and having a bit adapted to move said tumblers into a predetermined releasing position, and means operable from the inside of the door at a point out of alinement With said keyhole to release and operate said bolt with said tumblers in another releasing position; substantially as described.

53. In a look, a case, a bolt in said case, a keyhole at one side of the door, a plurality of tumblers for said bolt, a key insertible in said keyhole to actuate said bolt and adapted to move a number of said tumblers into a predetermined releasing position, and means operable from the opposite side of the door to release and operate said bolt by the actuation of a less number of tumblers; substantially as described.

54. In a look, a case, a bolt in said case, a keyhole at the outside of the door, a single group of tumblers for said bolt, a key insertible into said keyhole to actuate said bolt and adapted to move a number of said tumblers into a predetermined releasing position, and means operable from the inside of the door at a point out of alinement With said keyhole to release and operate said bolt by a difierent actuation of said tumblers; substantially as described.

55. In a lock, the combination of a case having a keyhole at the outside of the door, a bolt operative by a key inserted into said keyhole, a bolt operative from the inside of the door, a Ward member movable relative to both bolts and associated With the outside keyhole, and means for moving said Ward member into key blocking position With reference to said keyhole When the second bolt is protracted; substantially as described.

56. In a lock, the combination of a case having a keyhole at the outside of the door, a plurality of different keys insertible into said keyhole, a dead bolt in said case operable by all of said keys, a second bolt in said case, means operable from the inside of the door to protract said second bolt, a Ward associated With said keyhole, and means for moving said Ward into blocking position With respect to one or more of said keys automatically on the actuation of the means for operating said second bolt; substantially as described.

57. In a lock, the combination of a case having a keyhole at the outside of the door, an outside bolt operable by a plurality of WILLIAlVl E. SPARKS.

Witnesses:

JOHN H. SHAW BERTHA RAY.

keys 'insertible into said keyhole, a second bolt, operable from the inside of the door, and a pivoted Ward member movable relative to both bolts, and arranged to be auto- 5 matioally shifted into cooperation with the outside keyhole when the second bolt is protracted; substantially as described.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of l'atents,

Washington, I). 0'. 

